| abstract |
A battery capable of improving cycle characteristics by improving the stability of a solvent and an electrolyte used therefor are provided. A negative electrode 22 includes a single element, alloy or compound of a metal element capable of inserting and extracting lithium, or a single element, alloy or compound of a metalloid element. The separator 23 is impregnated with an electrolytic solution in which an electrolyte salt is dissolved in a solvent. The solvent contains a carboxylic acid ester or ketone in which the tertiary alkyl group is directly bonded to the carbonyl group as a low viscosity solvent. Examples of such carboxylic acid ester or ketone include (CH 3 ) 3 CCOOCH 3 or (CH 3 ) 3 CCOCH 3 . [Selection] Figure 1 |